Resources Contact Us Home
Device for detecting failure in piezoelectric apparatus

Image Number 10 for United States Patent #5376854.

A drive circuit for driving a piezoelectric element includes a transformer having a primary winding connected to a power source and a secondary winding connected to the piezoelectric element, a primary semiconductor element circuit connected to the primary winding for switching the current through the primary winding, and a secondary semiconductor element circuit connected to the secondary winding for switching the current through the secondary winding. A failure detection unit responsive to the potential at a predetermined point of the drive circuit is provided for detecting a failure in the piezoelectric apparatus and outputting a failure detection signal.

  Recently Added Patents
Geographically self-labeling access points
Comparison of visual information
Austenitic stainless steel welding wire and welding structure
LED illumination control using a simple digital command structure
Crowd control barrier II
Methods circuits apparatuses and systems for facilitating access to online content
Apparatus for transmitting and receiving data in a wireless communication system and method thereof
  Randomly Featured Patents
Oxygen delivery, oxygen detection, carbon dioxide monitoring (ODODAC) apparatus and method
Adjustable size sorting apparatus for round produce
Means for controlling the temperature of a depropanizer tower
Water-based lubricants containing sulfur as a coordinating atom and uses thereof
Electrodeless light source with self-contained excitation source
Door knob
Diagnostic assays using nucleic acid probes
Magnetic particle testing procedure involving pre-coating with a hydrophobic coating
Fluoro-substituted phenyl-cyclohexylacetylenes
Hat with ball marker